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measure: add json output
This commit is contained in:
Lennart Poettering
parent
82b0039eb0
commit
c06b6d46fd
@ -101,6 +101,8 @@
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<literal>sha512</literal>.</para></listitem>
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</varlistentry>
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<xi:include href="standard-options.xml" xpointer="json" />
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<xi:include href="standard-options.xml" xpointer="no-pager" />
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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</variablelist>
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@ -8,6 +8,7 @@
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#include "fd-util.h"
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#include "fileio.h"
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#include "hexdecoct.h"
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#include "json.h"
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#include "main-func.h"
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#include "openssl-util.h"
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#include "parse-argument.h"
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@ -23,6 +24,8 @@
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static char *arg_sections[_UNIFIED_SECTION_MAX] = {};
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static char **arg_banks = NULL;
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static JsonFormatFlags arg_json_format_flags = JSON_FORMAT_OFF;
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static PagerFlags arg_pager_flags = 0;
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STATIC_DESTRUCTOR_REGISTER(arg_banks, strv_freep);
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@ -47,15 +50,18 @@ static int help(int argc, char *argv[], void *userdata) {
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" status Show current PCR values\n"
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" calculate Calculate expected PCR values\n"
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"\n%3$sOptions:%4$s\n"
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" -h --help Show this help\n"
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" --version Print version\n"
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" --linux=PATH Path Linux kernel ELF image\n"
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" --osrel=PATH Path to os-release file\n"
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" --cmdline=PATH Path to file with kernel command line\n"
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" --initrd=PATH Path to initrd image\n"
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" --splash=PATH Path to splash bitmap\n"
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" --dtb=PATH Path to Devicetree file\n"
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" --bank=DIGEST Select TPM bank (SHA1, SHA256)\n"
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" -h --help Show this help\n"
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" --version Print version\n"
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" --no-pager Do not pipe output into a pager\n"
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" --linux=PATH Path Linux kernel ELF image\n"
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" --osrel=PATH Path to os-release file\n"
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" --cmdline=PATH Path to file with kernel command line\n"
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" --initrd=PATH Path to initrd image\n"
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" --splash=PATH Path to splash bitmap\n"
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" --dtb=PATH Path to Devicetree file\n"
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" --bank=DIGEST Select TPM bank (SHA1, SHA256)\n"
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" --json=MODE Output as JSON\n"
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" -j Same as --json=pretty on tty, --json=short otherwise\n"
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"\nSee the %2$s for details.\n",
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program_invocation_short_name,
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link,
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@ -70,6 +76,7 @@ static int help(int argc, char *argv[], void *userdata) {
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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ARG_NO_PAGER,
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_ARG_SECTION_FIRST,
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ARG_LINUX = _ARG_SECTION_FIRST,
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ARG_OSREL,
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@ -79,18 +86,21 @@ static int parse_argv(int argc, char *argv[]) {
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_ARG_SECTION_LAST,
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ARG_DTB = _ARG_SECTION_LAST,
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ARG_BANK,
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ARG_JSON,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "linux", required_argument, NULL, ARG_LINUX },
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{ "osrel", required_argument, NULL, ARG_OSREL },
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{ "cmdline", required_argument, NULL, ARG_CMDLINE },
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{ "initrd", required_argument, NULL, ARG_INITRD },
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{ "splash", required_argument, NULL, ARG_SPLASH },
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{ "dtb", required_argument, NULL, ARG_DTB },
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{ "bank", required_argument, NULL, ARG_BANK },
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{ "help", no_argument, NULL, 'h' },
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{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "linux", required_argument, NULL, ARG_LINUX },
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{ "osrel", required_argument, NULL, ARG_OSREL },
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{ "cmdline", required_argument, NULL, ARG_CMDLINE },
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{ "initrd", required_argument, NULL, ARG_INITRD },
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{ "splash", required_argument, NULL, ARG_SPLASH },
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{ "dtb", required_argument, NULL, ARG_DTB },
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{ "bank", required_argument, NULL, ARG_BANK },
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{ "json", required_argument, NULL, ARG_JSON },
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{}
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};
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@ -102,7 +112,7 @@ static int parse_argv(int argc, char *argv[]) {
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/* Make sure the arguments list and the section list, stays in sync */
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assert_cc(_ARG_SECTION_FIRST + _UNIFIED_SECTION_MAX == _ARG_SECTION_LAST + 1);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
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while ((c = getopt_long(argc, argv, "hj", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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@ -112,6 +122,10 @@ static int parse_argv(int argc, char *argv[]) {
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case ARG_VERSION:
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return version();
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case ARG_NO_PAGER:
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arg_pager_flags |= PAGER_DISABLE;
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break;
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case _ARG_SECTION_FIRST..._ARG_SECTION_LAST: {
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UnifiedSection section = c - _ARG_SECTION_FIRST;
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@ -134,6 +148,17 @@ static int parse_argv(int argc, char *argv[]) {
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break;
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}
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case 'j':
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arg_json_format_flags = JSON_FORMAT_PRETTY_AUTO|JSON_FORMAT_COLOR_AUTO;
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break;
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case ARG_JSON:
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r = parse_json_argument(optarg, &arg_json_format_flags);
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if (r <= 0)
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return r;
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break;
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case '?':
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return -EINVAL;
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@ -313,6 +338,7 @@ static int measure_pcr(PcrState *pcr_states, size_t n) {
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static int verb_calculate(int argc, char *argv[], void *userdata) {
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_cleanup_(pcr_state_free_all) PcrState *pcr_states = NULL;
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_cleanup_(json_variant_unrefp) JsonVariant *w = NULL;
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size_t n = 0;
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int r;
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@ -351,17 +377,49 @@ static int verb_calculate(int argc, char *argv[], void *userdata) {
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return r;
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for (size_t i = 0; i < n; i++) {
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_cleanup_free_ char *hd = NULL, *b = NULL;
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hd = hexmem(pcr_states[i].value, pcr_states[i].value_size);
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if (!hd)
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return log_oom();
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_cleanup_free_ char *b = NULL;
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b = strdup(EVP_MD_name(pcr_states[i].md));
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if (!b)
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return log_oom();
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printf("%" PRIu32 ":%s=%s\n", TPM_PCR_INDEX_KERNEL_IMAGE, ascii_strlower(b), hd);
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ascii_strlower(b);
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if (arg_json_format_flags & JSON_FORMAT_OFF) {
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_cleanup_free_ char *hd = NULL;
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hd = hexmem(pcr_states[i].value, pcr_states[i].value_size);
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if (!hd)
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return log_oom();
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printf("%" PRIu32 ":%s=%s\n", TPM_PCR_INDEX_KERNEL_IMAGE, b, hd);
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} else {
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_cleanup_(json_variant_unrefp) JsonVariant *bv = NULL;
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r = json_build(&bv,
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JSON_BUILD_ARRAY(
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JSON_BUILD_OBJECT(
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JSON_BUILD_PAIR("pcr", JSON_BUILD_INTEGER(TPM_PCR_INDEX_KERNEL_IMAGE)),
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JSON_BUILD_PAIR("hash", JSON_BUILD_HEX(pcr_states[i].value, pcr_states[i].value_size))
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)
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)
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);
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if (r < 0)
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return log_error_errno(r, "Failed to build JSON object: %m");
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r = json_variant_set_field(&w, b, bv);
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if (r < 0)
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return log_error_errno(r, "Failed to add bank info to object: %m");
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}
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}
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if (!FLAGS_SET(arg_json_format_flags, JSON_FORMAT_OFF)) {
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if (arg_json_format_flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_PRETTY_AUTO))
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pager_open(arg_pager_flags);
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json_variant_dump(w, arg_json_format_flags, stdout, NULL);
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}
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return 0;
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@ -441,6 +499,7 @@ static int validate_stub(void) {
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}
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static int verb_status(int argc, char *argv[], void *userdata) {
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_cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
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static const struct {
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uint32_t nr;
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@ -460,7 +519,7 @@ static int verb_status(int argc, char *argv[], void *userdata) {
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for (size_t i = 0; i < ELEMENTSOF(relevant_pcrs); i++) {
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STRV_FOREACH(bank, arg_banks) {
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_cleanup_free_ char *b = NULL, *p = NULL, *s = NULL, *f = NULL;
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_cleanup_free_ char *b = NULL, *p = NULL, *s = NULL;
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_cleanup_free_ void *h = NULL;
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size_t l;
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@ -481,27 +540,60 @@ static int verb_status(int argc, char *argv[], void *userdata) {
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if (r < 0)
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return log_error_errno(r, "Failed to decode PCR value '%s': %m", s);
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f = hexmem(h, l);
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if (!h)
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return log_oom();
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if (arg_json_format_flags & JSON_FORMAT_OFF) {
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_cleanup_free_ char *f = NULL;
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if (bank == arg_banks) {
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/* before the first line for each PCR, write a short descriptive text to
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* stderr, and leave the primary content on stdout */
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fflush(stdout);
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fprintf(stderr, "%s# PCR[%" PRIu32 "] %s%s%s\n",
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ansi_grey(),
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relevant_pcrs[i].nr,
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relevant_pcrs[i].description,
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memeqzero(h, l) ? " (NOT SET!)" : "",
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ansi_normal());
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fflush(stderr);
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f = hexmem(h, l);
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if (!h)
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return log_oom();
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if (bank == arg_banks) {
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/* before the first line for each PCR, write a short descriptive text to
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* stderr, and leave the primary content on stdout */
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fflush(stdout);
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fprintf(stderr, "%s# PCR[%" PRIu32 "] %s%s%s\n",
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ansi_grey(),
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relevant_pcrs[i].nr,
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relevant_pcrs[i].description,
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memeqzero(h, l) ? " (NOT SET!)" : "",
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ansi_normal());
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fflush(stderr);
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}
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printf("%" PRIu32 ":%s=%s\n", relevant_pcrs[i].nr, b, f);
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} else {
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_cleanup_(json_variant_unrefp) JsonVariant *bv = NULL, *a = NULL;
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r = json_build(&bv,
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JSON_BUILD_OBJECT(
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JSON_BUILD_PAIR("pcr", JSON_BUILD_INTEGER(relevant_pcrs[i].nr)),
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JSON_BUILD_PAIR("hash", JSON_BUILD_HEX(h, l))
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)
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);
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if (r < 0)
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return log_error_errno(r, "Failed to build JSON object: %m");
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a = json_variant_ref(json_variant_by_key(v, b));
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r = json_variant_append_array(&a, bv);
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if (r < 0)
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return log_error_errno(r, "Failed to append PCR entry to JSON array: %m");
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r = json_variant_set_field(&v, b, a);
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if (r < 0)
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return log_error_errno(r, "Failed to add bank info to object: %m");
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}
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printf("%" PRIu32 ":%s=%s\n", relevant_pcrs[i].nr, b, f);
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}
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}
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if (!FLAGS_SET(arg_json_format_flags, JSON_FORMAT_OFF)) {
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if (arg_json_format_flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_PRETTY_AUTO))
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pager_open(arg_pager_flags);
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json_variant_dump(v, arg_json_format_flags, stdout, NULL);
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}
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return 0;
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}
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